Quarter	Billions of US Dollars
1993-07-01	0.7424
1993-10-01	0.1359
1994-01-01	-0.2638
1994-04-01	0.1791
1994-07-01	0.3812
1994-10-01	-0.2525
1995-01-01	-0.0100
1995-04-01	-0.2011
1995-07-01	0.3660
1995-10-01	0.2868
1996-01-01	0.4193
1996-04-01	-0.5238
1996-07-01	-0.3586
1996-10-01	0.5216
1997-01-01	0.4905
1997-04-01	-0.3296
1997-07-01	0.0263
1997-10-01	0.3396
1998-01-01	-0.7862
1998-04-01	0.2682
1998-07-01	-0.3166
1998-10-01	-0.2727
1999-01-01	0.6898
1999-04-01	0.3835
1999-07-01	1.6724
1999-10-01	0.5473
2000-01-01	2.6921
2000-04-01	0.3620
2000-07-01	1.5794
2000-10-01	-2.0345
2001-01-01	3.1037
2001-04-01	-1.6445
2001-07-01	-1.5483
2001-10-01	0.2391
2002-01-01	-0.2179
2002-04-01	0.6380
2002-07-01	-1.0088
2002-10-01	-1.8891
2003-01-01	3.5205
2003-04-01	-1.8319
2003-07-01	-2.2356
2003-10-01	-0.4930
2004-01-01	1.5694
2004-04-01	0.4362
2004-07-01	1.3113
2004-10-01	-1.6473
2005-01-01	2.3695
2005-04-01	1.3525
2005-07-01	-1.1693
2005-10-01	-0.1861
2006-01-01	6.5864
2006-04-01	4.0184
2006-07-01	-4.5368
2006-10-01	-3.4948
2007-01-01	7.5326
2007-04-01	9.4261
2007-07-01	4.8521
2007-10-01	-17.4249
2008-01-01	6.1960
2008-04-01	-0.5696
2008-07-01	1.2390
2008-10-01	6.5100
2009-01-01	0.2106
2009-04-01	-7.1790
2009-07-01	-3.7781
2009-10-01	-3.2768
2010-01-01	2.6328
2010-04-01	-1.7755
2010-07-01	1.2361
2010-10-01	-2.1707
2011-01-01	11.7216
2011-04-01	-5.8741
2011-07-01	1.5051
2011-10-01	-3.6031
2012-01-01	-0.6251
2012-04-01	-2.0913
2012-07-01	-0.4480
2012-10-01	1.6867
2013-01-01	1.6291
2013-04-01	-5.6953
2013-07-01	5.0313
2013-10-01	0.8358
2014-01-01	1.9610
2014-04-01	0.3419
2014-07-01	-1.9806
2014-10-01	-0.7990
2015-01-01	0.3251
2015-04-01	-3.1080